Not able to see the profiling results properly for a profile generated from gperftools on mac OS High sierra

Please answer these questions before submitting your issue. Thanks!

### What version of pprof are you using?
Not able to find the version. How do I find one? I used `go get github.com/google/prof` to download the pprof.

### If you are using pprof via `go tool pprof`, what's your `go env` output?
### If you run pprof from GitHub, what's the Git revision?
`git log -1` produces the below output
```
commit 20ceacaff62f6bf3e7c08128ea03d6faa84c880c (HEAD -> master, origin/master, origin/HEAD)
Author: Alexey Alexandrov
Date: Wed Feb 14 09:16:22 2018 -0800

Enable MacOS binutils test. (#322)

```

### What operating system and processor architecture are you using?
macOS High Sierra version 10.13.1 (2.9 GHz Intel Core i5)

### What did you do?
`pprof --text sbmpart sbmpart_prof.out`
where `sbmpart` is the binary executable and `sbmpart_prof.out` is the profile output when the `sbmpart` binary is generated with `-lprofiler` flag for google gperftools.

### If possible, provide a recipe for reproducing the error.
### Attaching a profile you are trying to analyze is good.
I did the following steps:
```
make debug
CPUPROFILE=sbmpart_prof.out ./sbmpart argv1 argv2 argv3
pprof --text sbmpart sbmpart_prof.out
```
Note that the pprof referred to in step 3 is not from gperftools (I first install gperftools and then remove its pprof and then use go pprof)

I am also attaching the makefile and the profile generated from gperftools.

[Makefile.txt](https://github.com/google/pprof/files/1732411/Makefile.txt)
[sbmpart_prof.txt](https://github.com/google/pprof/files/1732395/sbmpart_prof.txt)

### What did you expect to see?
I expect to see the CPU profiling results for all the functions without any error.

### What did you see instead?
I see some errors. see below:
I have the below issues:
1. how to fix the unrecognized profile format
2. how to fix the unrecognized binary errors.

```
sbmpart: parsing profile: unrecognized profile format
Fetched 1 source profiles out of 2
Local symbolization failed for libdyld.dylib: unrecognized binary: /usr/lib/system/libdyld.dylib
Local symbolization failed for libsystem_platform.dylib: unrecognized binary: /usr/lib/system/libsystem_platform.dylib
Local symbolization failed for libsystem_c.dylib: unrecognized binary: /usr/lib/system/libsystem_c.dylib
Local symbolization failed for libsystem_m.dylib: unrecognized binary: /usr/lib/system/libsystem_m.dylib
Local symbolization failed for libsystem_kernel.dylib: unrecognized binary: /usr/lib/system/libsystem_kernel.dylib
Local symbolization failed for libsystem_malloc.dylib: unrecognized binary: /usr/lib/system/libsystem_malloc.dylib
Local symbolization failed for libsystem_kernel.dylib: unrecognized binary: /usr/lib/system/libsystem_kernel.dylib
Local symbolization failed for sbmpart: unrecognized binary: /Users/AkhilaRasamrtaMurthih/work/GraphChallenge/stochastic-block-partition/./sbmpart
Local symbolization failed for libsystem_c.dylib: unrecognized binary: /usr/lib/system/libsystem_c.dylib
Some binary filenames not available. Symbolization may be incomplete.
Try setting PPROF_BINARY_PATH to the search path for local binaries.
File: libobjc.A.dylib
Type: cpu
Showing nodes accounting for 19.24s, 99.12% of 19.41s total
Dropped 6 nodes (cum <= 0.10s)
flat flat% sum% cum cum%
7.81s 40.24% 40.24% 7.82s 40.29% [libsystem_kernel.dylib]
4.42s 22.77% 63.01% 4.61s 23.75% sbm_delta_entropy
1.64s 8.45% 71.46% 2.12s 10.92% [libsystem_platform.dylib]
1.61s 8.29% 79.75% 1.66s 8.55% sbm_met_has
1.36s 7.01% 86.76% 1.70s 8.76% sbm_dyn_csr_add
0.70s 3.61% 90.37% 5.86s 30.19% sbm_dyn_csr_flush_adj_lists
0.59s 3.04% 93.41% 0.68s 3.50% [libsystem_malloc.dylib]
0.39s 2.01% 95.41% 0.39s 2.01% [libsystem_m.dylib]
0.23s 1.18% 96.60% 0.36s 1.85% sbm_adj_list_node_init
0.21s 1.08% 97.68% 0.22s 1.13% sbm_propose_new_blk
0.14s 0.72% 98.40% 1.61s 8.29% [libsystem_c.dylib]
0.06s 0.31% 98.71% 0.12s 0.62% monotonic_seconds
0.02s 0.1% 98.82% 0.34s 1.75% sbm_adj_list_add_node
0.02s 0.1% 98.92% 1.45s 7.47% sbm_compute_iblk_ec
0.02s 0.1% 99.02% 0.14s 0.72% sbm_read_tsv_append
0.01s 0.052% 99.07% 10.04s 51.73% sbm_partition
0.01s 0.052% 99.12% 5.98s 30.81% sbm_update_iblk_ec
0 0% 99.12% 10.20s 52.55%
0 0% 99.12% 10.18s 52.45% [libdyld.dylib]
0 0% 99.12% 1.20s 6.18% [libprofiler.0.dylib]
0 0% 99.12% 10.18s 52.45% main
0 0% 99.12% 10.18s 52.45% sbm_stream_partition
```